Armature pegging machine



1 1950 H. v. WILLIAMS 2,512,403

ARMATURE PEGGING MACHINE Filed Nov, 14, 1947 3 Sheets-Sheet 1 INVENTOR. Hug Z/a/e'nf/ne M illfams June 2% E95@ H. v. WlLLlAMS 2,512,4Q3

ARMATURE PEGGING MACHINE Filed Nov. 14, 1947 3 Sheets-Sheet 2 INVENTOR. Hug/1 I/a/emz'ne Wi/[zbms BY Patented June 20, 1950 UNITED STATES PATENT OFFICE ARMATURE PEGGIN G MACHINE Hugh Valentine Williams, Richmond, Va.

Application November 14, 1947, Serial No. 786,077

r 2 Claims. (01. 29-205) My invention relates to a method of and means for securing the coils in armatures; and particularly to the pegging of the coils in the armature slots; the object being to seal the coils in the slots. The process of sealingor as it is commonly known: of pegging-consists of driving a strand of small rope or cord, or of twisted fabric, or even a strip of wood or of fiber, into the slot upon the top of the coil that has been placed therein. This process has been largely done by hand a slow and an irregular operation. To preserve rotative balance of the armature it is important that the wires be laid compactly, and that they be securely held in place. This condition I attain by the use of my pegging machine, to be described herein.

Operation of the machine The operation of my machine is, broadly, as follows: The armature is held in position opposite the end of a bed-plate; a driven-plate is arranged to slide forth and back upon or above the bedplate; a length of pegging material is pushed onto the bed-plate near and parallel to the side of the armature and opposite to a slot in the side of the said armature. The length of pegging material is normally greater in diameter than the width of the armature slot. A plate above the pegging material descends, and squeezes it to a thickness which can be driven into the slot of the armature; and instantly the driver-plate makes a rapid forward stroke and drives the pegging material into the armature slot. At the same time, a knife attached to the descending squeezing plate cuts off that part of the pegging material which lies on the bed-plate from the main supply. If desired: already cut lengths of pegging material may be placed by hand upon the bed-plate. The driverplate is then withdrawn; the squeezer plate (referred to hereinafter as the rocker plate) rises; and another length of pegging material is fed on to the bed-plate. The machine then comes to rest; and the armature is rotated to bring the next slot into position for pegging.

In the drawings: Figure 1 shows the machine in plan, at the end of a cycle; Figure 2, in. plan, the machine with the driver-plate at the end of its forward stroke; Figure 3 is a diagrammatic view, in elevation, of the machine as shown in Figure 1; Figure 4 is a diagrammatic view of the machine as shown in Figure 2, but in elevation; Figure 5 is a partial elevation, showing a detail of the machine.

[At one end of the base 2 there is supported a pneumatic cylinder 4, which is to be supplied with air through the pipe 6, the air flow being controlled by the hand valve 8. This is a two-way valve so constructed that when the handle is depressed more or less air is admitted to the cylinder 4; and so that when the handle is released, the compressed air is cut ofi, and the air in the cylinder is exhausted to the atmosphere. The air admitted to the cylinder acts upon piston Ill (Figs. 3 and 4), to which is secured a piston-rod I2. The outer end I4 of the piston-rod is axially bored and tapped for a screw thread I6 upon the rod I8. The rod I8 is not screwed into the pistonrod end I4, as the rod I 8 is not rotatable. But the piston-rod and the piston with it are turned so that the piston-rod thread I6 is turned upon the thread of the rod I8; the object being to provide means for adjustment of the stroke of parts of the machine. A wrench-fiat 20 is provided on the piston-rod I2'to aid in the turning of the piston and the piston-rod.

At the farther end of the rod I8 is fixed a plate 22, which I term the driver-plate; and on this driver-plate is constructed an inclined plane or cam 24. This cam 24 may be conveniently made an extension of the rod I8; or it may be welded to the end of the said rod. It is also secured by welding or by other means to the upper surface of driver-plate 22; and so that its cam face is uppermost, and the lowest part 26 of I the cam to the front. The weight of the end of the driverplate, of the cam 24, and of certain attachments to the rod I8 (to be described later) is supported by the carriage 28, on which are mounted rollers 30, which roll upon the base 2.

When air is admitted to cylinder 4 the pistonrod I2, rod I8, cam 24, and driver-plate 22 move forward toward the armature 32, which is to be pegged. The armature is placed against a bracket 34, the height of which may be changed to hold armatures of different diameters, by placing suitable liners under the bracket, and adjusting the distance of the bracket from the bedplate 36. This bed-plate 36 is set upon base 2;

, of the adjustment provided by turning the pistonrod I2 upon the threaded rod I8 the approach of the forward edge 40 of the driver-plate 22 to and into the armature slot 38 may be nicely regulated.

The driver plate 22 is retracted, when the air pressure on the piston I is released, by the simple means of the coiled springs 42, attached to brackets 44 on the rear cylinder head, and to a yoke 46, which yoke is mounted upon the threaded rod I8, and preferably held there by lock-nuts 48. The back stroke induced by springs 42 is limited by the stops or bufiers 49, against which the yoke 46 strikes. The back stroke of the piston may be cushioned by air or by rubber or by other known means. The springs 42 are not shown in Figs. 3 and 4.

Feeding the pegging material Adjacent the forward end of the bed-plate 36, and at its side, is the tube 53, through which the pegging material 52 is fed. This tube is mounted on suitable brackets attached to the bracket 54. Pivoted at 55 on a bracket 58 is the feeder-arm 69. Also pivoted, at 62, on bracket 58 is the bell-crank 64, the side arm 65 of which extends under cam 24 and rod I3, and behind the roller-carriage 28. The other end of the bell-crank 64 is connected by link 68 to feeder-arm 58. On the back stroke of piston In (induced by the springs 42) the roller carriage 28 strikes the end of bell-crank side-arm 66; throws the bell-crank 64; and, through link 68, the feeder-arm $0 is thrown to the position shown in Figure I. On the forward stroke of the piston III, the roller carriage 28 leaves the end of bell-crank side-arm 69; and the spring I0, pulls the feeder-arm 69 back to the position shown in Figure 2.

At the forward end of the feeder-arm SE} is.

pivoted, at I2, the finger I4; the pointed end I of which enters a slot IS in the side of the,

The limit of the backward movement of the.

feeder ar-m 60 is governed by the position of the stop 82-, which is pivoted at 84 on bracket 54. Its angular relation to the center line of the machine, and consequently the position of the stop 82, is set by means of the bolt 85 in the slotted arm 88 pivoted at 90.

At 92 is a spring finger, the free end of which presses lightly on the cord 52 in the tube 58, to prevent any retrograde movement of the cord therein. On each backward stroke of piston Ill and driver-plate 22 a measured length of cord will be fed across the bed-plate 36.

On each side of the bed-plate 36, and forming guides for the driver-plate 22, are brackets 94. On these brackets, at 96, is pivoted the rockerplate 98. The forward end of this rocker-plate coincides substantially with the forward end of the bed-plate 35; while its rearward end is above the rear end of bracket 94, and also of bed-plate 36. 'At the rear end of rocker-plate 98 there is securely mounted a forked bracket I99, between the forks of which is mounted a roller I92. The pin I94 on which roller I92 rotates is carried in vertical slots I96 in the rearward end of the bracket; and in which slots the upward movement of the pin I94 is adjusted by the set-screws I138. The roller I92 rides on the surface of the driver-plate 22 '(Fig. 3). In Figure 3 the piston I9, driver-plate 22, and cam 24 are shown retracted. On the forward stroke of the same the cam 24 passes under roller I02, and so tips up the rear end and tips down the forward end of the rocker-plate 98 (Fig. 4). The space left between the forward end of the rocker-plate 98 and of the bed-plate 36, after the downward movement of the former, is regulated by the vertical adjustment of roller I02. After the retraction of the cam 24, the forward end of the rockerplate 98 is caused to rise again, either by weighting the rear end of the said plate, or by spring action easily applied on the rear end of the plate or at the pivot 96. When the forward end of the rocker-plate 98 is raised, the measured length of pegging material is fed onto the bed-plate and under the end of plate 98. Then, on the admission of air to cylinder 4, the piston II], piston-rod I2, cam 24, and driver-plate 22 will make a quick forward stroke. The forward end of the rockerplate 98 will descend upon pegging material 52; press it to a thickness which can be pushed into the slot of the armature 32; and immediately thereafter the driver-plate 22 pushes the peg ging material against the knife II2, severs the length desired, and drives it into the slot 38 of armature 32. The intensity and speed of the stroke of the driver-plate is regulated and controlled by the control of the air admission valve 8 Indeed: the stroke is so well controlled that the edge of the driver-plate may be gently used to press the pegging material into place; or by short strokes to hammer it into the slot and to a solid seat within the slot and upon the coils. The pegging material 52 is out to length by means of a small knife II2 attached to the forward corner of the rocker-plate 98 on the side on which the material is fed. Its cutting edge III), which is preferably ground at an angle to the horizontal plane, is turned to the rear, so that it may partially cut the pegging material on the downward stroke of the end of the rocker-plate 98, and also so that it'rnay cut the material when the said material is driven against it by the forward stroke of the driver-plate 22. A detail of this knife is shown in Figure 5.

The pegging material may be of suitable kind and shape; but it is usually supplied in the form of a cord, of either round or rectangular section.

The position of the armature adjacent the bed-plate is such that the driver-plate is 'op-' p'osite to the slot 'of the armature to be pegged. This position may be secured by placing upon the armature bracket or upon the end of the bed'- plate or adjacent the bed-plate a tit over which the end of an armature slot may be slipped. When placed on or adjacent the bed-plate it is placed on a level with the driver-plate.

I claim:

1. In an armature pegging machine: in combination, a rectangular bed plate; reciprocating power means at one end of the bed plate set to reciprocate in the direction of the center line of and substantially parallel with the bed plate; adjacent the opposite end of the bed plate a bracket adapted to support an armature with a slot level with and in line with the end of, the bed plate; a rocker plate pivotally mounted intermediatc its ends on the bed plate and having its forward end over and in line with the forward end of the bed plate and parallel with the axis of the armature; a cam advanced by the reciproeating power means and adapted to engage andjto raise the rear end of the rocker plate and'so del press the forward end of the said rocker plate; means for depressing the rear end of the rocker plate and so raising the forward end of the said plate on the withdrawal from the said rocker plate of the said cam; means for feeding pegging material onto the forward end of the bed plate, the said means being actuated by the reciprocating means toward the end of its backward stroke; a knife on theforward end of the rocker plate at the side adjacent the feeding means and with its cutting edge presented rearwardly and to the pegging material fed upon the bed plate; and a driver plate reciprocated between the bed plate and the rocker plate by the reciprocating power means to drive the pegging material against the knife to sever the length upon the bed plate and drive it into the armature slot.

2. In an armature pegging machine: in combination, a bed plate; reciprocating fluid pressure means located adjacent the bed plate and set to reciprocate in the direction of the center line of the bed plate; a rocker plate pivotally mounted on the bed plate to rock in the direction of the said center line, and having its forward end over and in line with the forward end of the bed plate; an armature supporting bracket adjacent the forward end of the bed plate and adapted to support an armature with its slots in line with and parallel to the end of the bed plate; a driver plate connected with and driven by the fluid pressure reciprocating means to reciprocate between the rocker plate and the bed plate; a cam mounted on the rear end of the rocker plate and adapted to engage on the forward stroke of the reciprocating means the rear end of the rocker plate to raise it and to depress the forward end of the said rocker plate; a means for feeding pegging material onto the bed plate during the last part of the rearward stroke of the reciprocating means; means attached to the forward end of the rocker plate to sever a length of material from the supply; and fluid means hand-valve controlled and adapted to actuate the REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,435,357 Weber Nov. 14, 1922 1,449,371 Apple Mar. 27, 1923 1,487,302 Willis Mar. 18, 1924 1,949,739 Eaton Mar. 6, 1934 2,192,801 Poole Mar. 5, 1940 2,305,273 Poole et a1 Dec. 15, 1942 

